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PC doesn't turn off

Z

Zoom123

Member
I have a PC which I just upgraded to Win 7 Ultimate 64bit from Win XP Pro (clean install).

Everything is fine except that now when I click the Shut Down button in windows, windows shuts down as usual, the monitor turns off, but the computer continues running (power light on, fans spinning) The only way to turn it off is by keeping the power button pressed for a few seconds.

Any idea why this is happening and how to solve this issue? I don't think it can be a hardware issue as the same computer was running fine with Win XP.
 
Yeah, it's likely a hardware issue. I have the same problem with an HP Z555 running a clean install of MCE2K5.

Go into Device Manager, right-click on an input device (i.e. keyboard or mouse, or etc) and select Properties. Go to the Power Management tab and uncheck "Allow this device to wake the computer". Then attempt the same shutdown scenario.

If it still repros, move on to the next input device. Once the machine can properly power down, you have identified the culprit. This might be fixable with newer (or older) drivers than what you are currently using. If not, you might be stuck leaving the option unchecked.
 
Thanks Slugbait but it didn't work. I did this for the Keyboard/Mouse compo which is the only input device I have, and I even replaced them with a different Keyboard mouse. I also did this for the Ethernet adapter which was the only other thing with "Allow this device to wake the computer" option, but this didn't help either.

Any other options?

nickbits, this was a clean install.
 
Have you installed anything else besides the operating system? Are you sure that you don't have something like a process hanging, or an application otherwise terminating ungracefully?
 
I installed a few programs, like Google Chrome, Avast antivirus etc, but these are programs I install on all my PCs and never had any issues. Also this happens before I run any program (apart from Avast that loads on startup). I just turn on the PC and the try to power it off.

The windows shut down procedure seems to proceed normally. I see the shut down screen, then the monitor turns off ... just the computer itself doesn't turn off for some reason.
 
I would have to take it out from another computer. But why would the PSU cause this problem with Win 7? It was working fine all this time with XP.
 
Since the computer fully goes through the shut down procedure but doesn't actually power off, it sounds to me like the ACPI HAL isn't working. If you go to the Device Manager and expand the Computer tree, what do you see? (hey that rhymes)
 
I see ACPIx64 based PC.

Are there any drivers for the motherboard I need to install? The device manager didn't show any errors so I assumed windows automatically installed all needed drivers.

One more thing: If I choose restart instead of shut down the computer restarts fine, and it powers off totally before it restarts again.
 
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